MoFi UltraPhono phonostage... Sound quality?

Discussion in 'Audio Hardware' started by dogpile, Mar 14, 2017.

  1. Firehead

    Firehead Well-Known Member

    Location:
    HTX
    I would agree the output is not towards the warm side. As someone would likes the warm sound does not mind the quality and sound from the Mofi pre-amp. I am impressed with the increased clarity and separation in instruments and vocals.
    Very happy with my purchase. I can only image the improvement once I upgrade my TT.
     
    MikeJedi and bluemooze like this.
  2. johnny q

    johnny q Forum Resident

    Location:
    Bergen County, NJ
    Very interesting - I need to check this out. If true, this means I have had the filter activated every day since September 2017 " :)
     
  3. MikeJedi

    MikeJedi Forum Resident

    Location:
    Las Vegas
    I like the way the StudioPhono sounds.. I’d say it’s pretty neutral and sounds amazing in my system. My def techs are warmish sounding speakers so maybe that’s why I like the way they interact
     
    bluemooze likes this.
  4. GeraldB

    GeraldB Active Member

    May I ask where you ordered from? I'm thinking about getting one as well, and would prefer a Canadian source. (PM if you prefer.)
     
  5. dconsmack

    dconsmack Forum Resident

    Location:
    Las Vegas, NV USA
    I have the same issue with mine: the subsonic filter is engaged when the button is NOT depressed. Otherwise, it works well and sounds amazing.
     
    johnny q likes this.
  6. johnny q

    johnny q Forum Resident

    Location:
    Bergen County, NJ
    As a follow-up on this, I probably will not get a chance to check this out myself until the weekend. So in the meantime, I emailed MoFi asking if this is correct and if there is a known typo in the manual.
     
  7. johnny q

    johnny q Forum Resident

    Location:
    Bergen County, NJ
    Interesting! You can tell it's on, based on the speakers shaking or not shaking? Is there a difference in tone when engaged/disengaged?

    As I mentioned in my post above, I emailed MoFi about this. I will also check it out for myself when time permits. A key find indeed :) I wonder if its a design issue or a manual typographical error.
     
  8. JustGotPaid

    JustGotPaid Forum Resident

    I always use the subsonic filter. I feel everything is better defined when the amp in not trying to reproduce those sub bass frequencies. Plus when you have it cranked you don't have to worry about extreme woofer excursion from walking by the turntable.
     
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  9. JustGotPaid

    JustGotPaid Forum Resident

    I found 2 sources up here. hifipro.ca in Montreal and executivestereo.com in Toronto.
     
  10. dconsmack

    dconsmack Forum Resident

    Location:
    Las Vegas, NV USA
    I didn’t notice a change in tone. I did a needledrop of a 1kHz test tone so I could use the spectrum anylizer in Audacity recording software to not only see where my tonearm resonance was, but also to A/B the MoFi’s subsonic filter’s amount of rumble attenuation. I don’t think I would have discovered the button discrepancy otherwise. That being said, my tonearm’s resonance was at 8Hz and the MoFi’s subsonic filter reduced it by 20dB. So, other than the button position needing to be opposite of what the manual specifies, the filter works great and has no negative impact on audio quality in the audible range.
     
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  11. johnny q

    johnny q Forum Resident

    Location:
    Bergen County, NJ
    Here is the reply from MoFi:

    "
    Hi John,

    Yes the first run of manuals was incorrect. When the subsonic button is in the “up” position it is engaged, when pushed down it is disengaged. Sorry for the confusion.

    All the best,"
     
  12. 4011021

    4011021 Forum Resident

    Location:
    Brazil
    I have a chance to buy the MoFi Ultra Phono in the near future. I would choose it over the Studio mostly because of the headphone jack. Had anyone compared with the Musical Fidelity V90 LPS? I have it and like it a lot. It's a $199 vs. a $499 so I expect some improvement but would like to know if anyone has the experience.
     
    clhboa likes this.
  13. MikeJedi

    MikeJedi Forum Resident

    Location:
    Las Vegas
    That’s weird. I’ve been listening with it up and I thought it was normal and sounds fine. I would wonder what would happen if I press it in ? Lol. Does the same thing apply to the mono switch ??
     
  14. Mrtn77

    Mrtn77 Forum Resident

    Location:
    European Union
    You're not supposed to hear the subsonic filter in action : that's the whole point !

    More intuitively, the mono switch is engaged when the button is pressed down. Try it on a stereo record and you'll soon hear the difference.
     
    MikeJedi, HiFi Guy and 4011021 like this.
  15. Seancito

    Seancito Well-Known Member

    Location:
    Richmond, Virginia
    I just looked at the manual online and it states something like "to activate the mono feature depress the button" and "to bypass the subsonic filter, depress the button" I take that to mean press the mono button down to activate it on mono records, and leave the subsonic button up to activate that filter. Kind of backwards and confusing, but I'll take it. My buttons on my Studio Phono are both always up for stereo records and mono one is down when playing mono.
     

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